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Rvsm Related Red Squares  
User currently offlineHAWK21M From India, joined Jan 2001, 31667 posts, RR: 56
Posted (9 years 1 month 2 weeks 2 days 9 hours ago) and read 5278 times:

I've noticed some Aircraft have Rounded tipped red squares painted around RVSM related Areas needeed to be aerodynamically clean & undamaged for RVSM Ops.
Where as some Aircraft don't.
Is the marking Mandatory.
regds
MEL


Think of the brighter side!
11 replies: All unread, jump to last
 
User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 1, posted (9 years 1 month 2 weeks 2 days ago) and read 5233 times:

Our aircraft don't have a red bordered area around the static ports and we are RVSM. The area around the ports remains unpainted, but the size of the unpainted area has not increased. There are numerous restriction on repairs in our SRM, but no border.

I did a quick search of the FARs and couldn't really find anything, but didn't spend much time.


User currently offlineUAL Bagsmasher From United States of America, joined Sep 1999, 2146 posts, RR: 10
Reply 2, posted (9 years 1 month 2 weeks 1 day 22 hours ago) and read 5220 times:

Our aircraft (CRJ-200) are required to have a bordered area placarded around the RVSM critical area. Our squares are black in color. Any fuselage within that placarded area has to be perfectly smooth. Even chipped paint over rivet heads has to be sanded down. Any access dooors in that area must close perfectly flush. If you look closely at one of our planes, you'll notice quite a few sanded/primed areas within the RVSM area. The biggest PITA concerning RVSM is keeping those little squares applied. We tried decals, but they tore off quickly. Now we are using a paint pen, which isn't much better. Every 2 or 3 days they need to be re-applied.

User currently offlineHAWK21M From India, joined Jan 2001, 31667 posts, RR: 56
Reply 3, posted (9 years 1 month 2 weeks 1 day 6 hours ago) and read 5166 times:

Quoting UAL Bagsmasher (Reply 2):
PITA

Whats PITA
regds
MEL



Think of the brighter side!
User currently offlineDanman From United Kingdom, joined Jul 2002, 39 posts, RR: 0
Reply 4, posted (9 years 1 month 2 weeks 1 day 5 hours ago) and read 5162 times:

Hi Mel
It stands for Pain In The A** or something very similar.


User currently offlineHAWK21M From India, joined Jan 2001, 31667 posts, RR: 56
Reply 5, posted (9 years 1 month 2 weeks 1 day 4 hours ago) and read 5159 times:

Quoting Danman (Reply 4):
Hi Mel
It stands for Pain In The A** or something very similar.

Ok...... Smile
regds
MEL



Think of the brighter side!
User currently offlineJeb94 From United States of America, joined Oct 2004, 598 posts, RR: 5
Reply 6, posted (9 years 1 month 2 weeks 5 hours ago) and read 5111 times:

What sort of paint are you using and are you giving it time to set up correctly? I don't know how the aerodynamics work on your planes but the MD80 hasn't been much of a problem and we have these big circles with a wedge in front of the primary ports. These markings also have something to do with the enhanced GPWS system I think as my previous employer doesn't use similar markings, at least not ones so easily seen.

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Photo © John Thompson



User currently offlineHAWK21M From India, joined Jan 2001, 31667 posts, RR: 56
Reply 7, posted (9 years 1 month 1 week 6 days 7 hours ago) and read 5070 times:

I would think Decals would be better bonded than Paint.Anyone.
regds
MEL



Think of the brighter side!
User currently offlineYikes! From Canada, joined Oct 2001, 284 posts, RR: 1
Reply 8, posted (9 years 1 month 1 week 6 days ago) and read 5055 times:

You may be referring to the ETOPS sensitive areas around pitot and static port installations.

User currently offlineAvionicMech From United Kingdom, joined Jan 2005, 315 posts, RR: 3
Reply 9, posted (9 years 1 month 3 days 2 hours ago) and read 4951 times:

What do you mean by the ETOPS sensitive areas? I have only ever heard of the RVSM areas as mentioned around the static ports but not ETOPS.

You are allowed repairs in the RVSM area but it has to be 'flow tested' by the manufacturer to ensure it won't affect the airflow and therefore the altimeter readings.


User currently offlineYikes! From Canada, joined Oct 2001, 284 posts, RR: 1
Reply 10, posted (9 years 1 month 2 days 21 hours ago) and read 4934 times:

Sorry, can't elaborate more. That was what I was told when I did my ETOPS pilot training back in '97 in Canada. Granted, RVSM started on the NAT's in early 1997 and maybe I was told the wrong information.

As far as RVSM goes, I was told that it was only the immediate area around the static ports that mattered. But perhaps since surface damage can also affect pitot tube airflow, most likely you're right. Especially if you're in the maintenance side. Unfortunately, the flow of info between our groups isn't as good as it could be!

Thanks for the Q,

Yikes!


User currently offlineAvionicMech From United Kingdom, joined Jan 2005, 315 posts, RR: 3
Reply 11, posted (9 years 1 month 2 days 16 hours ago) and read 4929 times:

It is only the area around the static ports that matters for RVSM as on aircraft such as the 757 and 737NG, but on aircraft like the 767 and 737 Classic which have a combined Pitot-Static head the RVSM area is around the heads rather than a separate static port as they don't have them.

If you look at the picture of the 757 below you can see where we have performed a repair in the RVSM area. Before the repair was authorised by Boeing they punched the numbers into their magic computer to calculate if the pressure entering the static port would be disturbed by this patch behind it, and obviously it didn't so the repair was carried out.

Separate static ports:


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Photo © Antonio Carrasquilla - Iberian Spotters
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Photo © Michael Priesch - Spotterteam Graz



Combined Pitot Static Heads


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Photo © Tamás Mihalik - Skyarts Aviation Photography
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Photo © Jid Webb



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